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Just In Time arrival can reduce fuel consumption and emissions by 14%

Containerships can reduce fuel consumption and resulting carbon dioxide emissions by 14% on a per voyage basis using Just In Time arrival.

This is what a new study, commissioned by the IMO-Norway GreenVoyage2050’s Global Industry Alliance to Support Low Carbon Shipping (Low Carbon GIA) has found.

What is Just In Time (JIT) arrivals

JIT arrivals allow ships to optimise speed during their voyage to arrive in port when berth, fairway and nautical services are available. Refer to this article on more about Just In Time Arrivals.

JIT has been touted as an important tool that can contribute to a ship attaining its required carbon intensity indicator (CII) and associated CII rating in accordance with IMO’s short-term GHG reduction measure, which will enter into force later this year.

JIT along with the enhanced Ship Energy Efficiency Management Plan (SEEMP) is set to play a key role in the implementation of IMO’s recent energy efficiency measures.

As per an IMO press release, this study, undertaken by MarineTraffic and Energy and Environmental Research Associates (EERA), explores the global implementation of JIT in the container sector.

Using AIS data from the calendar year 2019 (pre-pandemic), the impact of JIT on fuel consumption and emissions was assessed by optimizing all voyages in three scenarios:

1. Over the entire voyage,
2. Over the last 24 hrs, and
3. Over the last 12 hrs.

The results of the study show that while optimizing speed over the entire duration of a voyage offers the greatest saving opportunity (displaying a mean fuel saving per voyage of 14.16%), there were benefits in all scenarios with savings of 5.90% (24 hrs scenario) and 4.23% (12 hrs scenario), respectively.

These results indicate that implementing JIT over the last 12 hours of a voyage can greatly contribute to fuels and emissions savings.

In fighting climate change, global shipping has a steep mountain to climb, and we need to pull all levers to deliver in line with the Paris Agreement. The study underlines that while we work to accelerate and scale the availability of the future green fuels, in the short-term significant emissions reductions can be achieved by bringing vessels, terminals and ports together to exchange standardized data and facilitate Just In Time arrivals,” said Capt. Andreas M. van der Wurff, Port Optimisation Manager at A.P. Moller-Maersk and Chair of the Low Carbon GIA Ship-Port Interface workstream.

The Low Carbon GIA is a public-private partnership with the aim to develop innovative solutions to address common barriers to decarbonizing the shipping sector. It has been actively exploring the concept of JIT through various research projects and several industry stakeholder roundtables. In 2020, it published the Just In Time Arrival Guide – Potential Barriers and Solutions, providing guidance to stakeholders towards the implementation of JIT Arrivals.

The Low Carbon GIA was established in 2017 under the framework of the GEF-UNDP-IMO GloMEEP Project and now continues to operate under the framework of IMO-Norway GreenVoyage2050 Project.

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